Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-12-2018 and time 23:27:40 (Italy) in region 2 km SE Norcia (PG)

A magnitude ML 1.0 earthquake occured in region: 2 km SE Norcia (PG), on

  • 09-12-2018 22:27:40 (UTC)
  • 09-12-2018 23:27:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7770, 13.1050 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 2 4957 4957
Cascia PG 10 3217 8174
Preci PG 13 724 8898
Castelsantangelo sul Nera MC 14 281 9179
Accumoli RI 15 667 9846
Poggiodomo PG 16 117 9963
Arquata del Tronto AP 16 1178 11141
Cerreto di Spoleto PG 16 1075 12216
Visso MC 17 1107 13323
Cittareale RI 18 482 13805
Monteleone di Spoleto PG 19 599 14404
Ussita MC 19 444 14848
Sellano PG 19 1079 15927
Vallo di Nera PG 20 364 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km W of Chieti (51815 inhabitants)
99 Km SW of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.0 2018-12-09
22:27:40		 42.7767 13.1052 10 2018-12-09
22:32:32		 Sala Sismica INGV-Roma 63803471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-09 22:27:40 ± 0.08
Latitude 42.7767 ± 0.0027
Longitude 13.1052 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63803471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 142
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 121
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 63803471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-09 22:32:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RMP.HHZ. 2018-12-09T22:28:14.55 3.0 undecidable manual S -0.08 0
IV.MTRA.EHZ. 2018-12-09T22:27:49.06 0.1 undecidable manual S 95 23.8539 112 -0.11 98
IV.GIGS.HHZ. 2018-12-09T22:27:49.70 3.0 positive manual P -0.34 0
IV.MMO1.EHZ. 2018-12-09T22:27:48.59 0.3 undecidable manual S 53 22.5552 113 -0.18 72
IV.TERO.HHZ. 2018-12-09T22:27:48.42 3.0 positive manual P -0.24 0
IV.MC2.EHZ. 2018-12-09T22:27:47.03 0.1 undecidable manual S 24 16.4724 121 0.17 98
IV.GAVE.EHZ. 2018-12-09T22:27:47.70 0.3 undecidable manual S 241 19.5693 116 -0.12 74
IV.LNSS.HHZ. 2018-12-09T22:27:47.76 0.3 undecidable manual S 195 19.9689 116 -0.2 72
IV.RM33.EHZ. 2018-12-09T22:27:46.43 0.3 positive manual P 163 31.0467 50 -0.19 71
IV.FDMO.HHZ. 2018-12-09T22:27:46.11 0.3 positive manual P 357 28.8489 50 -0.17 72
IV.T1299.HNZ. 2018-12-09T22:27:45.15 0.1 undecidable manual P 138 21.3675 114 0.2 96
IV.MMO1.EHZ. 2018-12-09T22:27:45.19 0.3 undecidable manual P 53 22.5552 113 0.02 75
IV.MTRA.EHZ. 2018-12-09T22:27:45.39 0.3 undecidable manual P 95 23.8539 112 -0.01 75
IT.MTCL.HGZ. 2018-12-09T22:27:45.57 0.3 undecidable manual P 340 25.5522 111 -0.15 72
IV.SMA1.EHZ. 2018-12-09T22:27:45.65 0.3 negative manual P 131 24.753 111 0.07 74
IV.LNSS.HHZ. 2018-12-09T22:27:44.78 0.1 undecidable manual P 195 19.9689 116 0.09 99
IV.MC2.EHZ. 2018-12-09T22:27:44.35 0.1 undecidable manual P 24 16.4724 121 0.29 95
IV.GAVE.EHZ. 2018-12-09T22:27:44.85 0.1 undecidable manual P 241 19.5693 116 0.23 96
IV.NRCA.HNZ. 2018-12-09T22:27:43.97 0.1 undecidable manual S 7 6.3936 147 -0.3 97
IV.NRCA.HNZ. 2018-12-09T22:27:42.70 0.1 undecidable manual P 7 6.3936 147 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.0 0.00008065 0.96 AML other m 2018-12-09T22:27:49.54
IV.GAVE.EHE. ML:1.1 0.00010525 0.16 AML other m 2018-12-09T22:27:49.10
IV.LNSS.HHE. ML:1.1 0.000090410195 0.1792 AML other m 2018-12-09T22:27:48.83
IV.FDMO.HHE. ML:0.8 0.0000331227555 0.1792 AML other m 2018-12-09T22:27:51.48
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download